An extremely large Autobot. He was first seen as a holographic projection Hound used to scare off the Decepticons. In later media he was revealed to be an actual Autobot that the Decepticons truly fear.

Optimus Prime is the leader of the Autobots, the heroic faction of Cybertronians from the Transformers series. Said to be one of the greatest warriors of the Cybertronian Civil War, Optimus Prime transforms into a Kentworth cab forward truck.